Alex - Before I understood gerbil genetics I did this. First go to the
Gerbil Palette page here -- http://home.wtal.de/ehr/gerbils/colors.htm
and write down the genes of the gerbils that look like yours. Then go
to the Gerbil predictor link here--
http://www.netxp.com/rick/gerbils/frameset.html and enter their genes
there. You will then get an approximation of colors that are possible
in the offspring. This wont be accurate because you don't know what the
recessives are, but you will have an idea.
--
Gary's web pages -
http://home.talkcity.com/StudioDr/go5
Save the GML and the GGMLE's!